how do i put my iMac 27" back to factory setting with no disk

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how do i put my iMac 27" back to factory setting with no disk

hi, i bought a imac 27" from the apple store yesterday, i already have a imac 24", when starting up the imac for the first time it asked me if i wanted to use migration assistant i said yes and restored my new imac from time capsule that i used for the 24", everything went fine, then on second thoughts i,m wanting to set my new imac 27" as a new computer, but it came with no install disks, ive looked in the electronic booklet and it says "go into utilites and select reinstall osx" ive been in utilites but this is not there, ive used software update and downloaded all the updates

any help is appreiciated

thanks kev

iMac, Mac OS X (10.7.2)

Posted on Oct 21, 2011 11:45 AM

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Answer 1

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baltwo

Level 9

62,362 points

Oct 21, 2011 12:13 PM in response to monkified

Restart, holding down CMD+R, select Disk Utility, wipe the HD, and install the OS. BTW, that action will require that you reset EVERYTHING on your new machine and reinstall all of your 3rd-party software. IMO, that's a waste of time. What you have now acts like the original and retains all of your settings and apps. Details in http://www.apple.com/macosx/recovery/ and http://support.apple.com/kb/HT4718

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Answer 2

monkified Author

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Oct 21, 2011 12:35 PM in response to baltwo

thanks for that, what my thinking was is all my apps and other stuff that ive been installing and uninstalling on my old imac over the last 2yrs may have left files that are cluttering and slowing my mac down and with me transferring these over to my new mac, my new mac may start running slowly more quickly if that makes sense.

i just thought if i do a fresh install then reinstall my apps and stuff it mat be better for my new mac in the long run?

i do regulary run clean my mac and lion cache cleaner, is there a better maintenance app on the market?

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Answer 3

baltwo

Level 9

62,362 points

Oct 21, 2011 12:49 PM in response to monkified

All I can say is that my current installations all came from OS 9 and Jaguar. I've not attempted to clean them the past eleven years and have beta-tested every cat from Panther on, so cleaning, as a routine is a waste of time. What I do is follow the advice in these linked articles:

Mac Maintenance Quick Assist,
Mac OS X speed FAQ,
Speeding up Macs,
Macintosh OS X Routine Maintenance,
Essential Mac Maintenance: Get set up,
Essential Mac Maintenance: Rev up your routines,
Maintaining OS X,
Five Mac maintenance myths, and
Myths of required versus not required maintenance for Mac OS X

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Answer 4

monkified Author

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Oct 21, 2011 1:28 PM in response to baltwo

thanks for your help, makes very interesting reading

your help is apreiciated

thanks

kev

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